Damper.



D. W. POWERS.

DAMPER.

APPLIOATION FILED AUG. 25; 1911.

Patented Aug. 6, 1912.

2 SHBETSSHEET 1.

D. W. POWERS.

DAMZER.

APPLICATION FILED AUG. 25, 1911.

Patented Aug. 6, 1912.

2 SHBETS-SHEET 2.

DAMPER.

. Specificationof Letters Patent.

Patented Aug. ,1912.

Application filed August 25, 1911. seria'rno. 645,921..

To all whom it may concern! Be it known that I, DAVID W. Pownns, a citizen of the United States, residing at Edgewood, in the county of of California,have invented certain new and useful Improvements in Dampers; and I do herebydeclare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art'to which it appertains to make and use the same.

This invention relates to an improvement in stove dampers,and has for its principal obj ect to provide an automatic damper for controlling the draft through the pipe.

- Another object of the invention is to provide a damper'of the character described which is provided with a novel means for holding the damper in any adjusted positions.

i j A further object of the invention is, to

provide a damper of the class described whichis movable independently-of the holdmg means in a certain position of the latter, thereby permitting the draft through the pipe to be automatically regulated. A still further object. of the invention is to provide a damper for the purpose described which is composed of a minimum number of parts, is therefore simple in construction and is cheap to manufacture.

With these and other objects in view, the invention consists. in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended; itbeing. understood that various changes inthe form, proportion-,- size and minor details of construction within the scopeof the claims, may be resortedto without departing. from the spirit or sacrificing any of the advantages of the invention.

In the drawings: Figure 1 is a side elevation' of a stove pipe section having my inventionv associated therewith, Fig. 2 is a horizontal sectional view taken through the construction 'shown in Fig.- 1, Fig. 3 is a longitudinal vertical section of Fig. 1, Fig. i

4 is a cross sectiontaken on the line 4-4 of Fig. 1, Fig. 5 is a detail bottom plan View of thecasing, and Fig. 6 is a perspective view of the damper and its operating means.

Like reference numerals designate corresponding parts in all the figuresj ,7

Referring to the drawings, 5 designates an ordinary pipe section havingan opening Siskiyou, State cludes side walls 8 8,. end walls 9'9 and a bottom 10, the latter being disposed in spaced relation to the pipe section 5. A transversely disposed opening 11 is formed in the base 10 of the casing and a closure 12 for the opening. is slidably mounted between fianges 1313 carried by said base. Formed in theside walls 8 of the casing and in the same plane as the longitudinal e ges *-6 of the'opening'B are openings 14-44:, in which is mounted for rotation a transverse shaft 15, which is located intermediate the ends ofthe openingfi. The ends of the shaft 15 project beyond the opposite walls 8 of the casing, and one end thereof is bent i at an angle and terminates in a handle -16. Fixedly mounted on the rod 15 andflisposed between the handle 16 and the adjacent wall 8, and bearing against the-latter, is a washer 17. The other end 18 of the rod is threaded and associated with said end is a nut 19. Disposed around the rod between the nut 19 and the adjacent wall8 is a coil tension spring 20 which yieldingly holds the rod 15' in any adjusted position, yet permitting of the same to revolve;

Disposed within the section: .5 and normallyat one side of the opening 6 is a dam per plate 23. Arod24= of angle construction isprovided at its angle with an opening 25 'wherethrough passes the rod 15. It. is to be noted by this construction that the rod 24: is journaled on the rod 15 to swing vertically. One arin 26 of this rod normally rests upon the bottom of the section 5 when the damper 23 is in its closed or upright position. 'This arm 26 is bent at right angles and terminates in a fork 27 which is attached to the damper 23 by rivets or other suitable fastening means. 'The other arm 28 of the angle arm, when the damper is in the position abovedescribed, passes downwardly through the opening 6 and into the casin 7. This arm is threaded, and en gaged therewith is a Wei ht 29, said weight being thereby capable o adjustment. along said arm. Y From the foregoing, it will be observed that the damper 23 is pivotally mounted upon the rod 15, and is normally held in its upper or closed position by means ofthe weight. 29. When it is desired to have con-Q siderable draft, the weight 29 can be shifted upwardly along the arm 28. This will permit of the draft passing through the "pipe section to open the damper 23 to a more or less extent depending of course upon the position of the weight. It will also be observed in this connection that by means of this weight the amount of draft through the section can be easily regulated.

In order to positively lock the damper in either its open or closed position, I. have provided a pair of substantiallyv U-shaped 'arms 30-30 which respectively have their ends connected to the rod by any suitable means. These arms 30 are disposed in .planes at right angles to each other, and are 15 both disposed below the pipe section 5 and on opposite sides of the arm 28. As will be observed from Fig. 2 of the drawings, one

of the arms 30 is disposed in ground .engagement against the arm 28, thereby positively holding the same against movement. Should it be desired to release the damper 23, the handle 16 is operated and the shaft 15 thereby rota-ted until the arms 30 are equi-distant from the arm 28. In this posi- 'tion the damper 23 can be automatically moved by the draft passing through the section. When it is desired to hold the member 23 in an open position, the rotation of the shaft 15 is continued until the opposite arm 30 engages the arm 28 and elevates the same.

From the foregoing, it will be seen that a the damper may be locked against movement in either its open or closed position, or 3 that the damper may be free to move when the locking means is disposed in a certain position.

What is claimed is: 1. The combination with a stove pipe sec- 40 tion having an opening formed therein, of

a casing connected to the section on opposite sides of the opening, a transverse rod journaled in the casing and extending across the opening of the section, a handle connected to one end of the rod and disposed exteriorlyof the casing, a supporting arm fulcrumed on the rod and having its inner end disposed Within the section, the outer end projecting through the opening and into the casing, a damper connected to said inner end, a weight connected to the outer. end of the supporting arm for normally retaining the damper in a closed position, and means carried by the rod adapted in cert-ain'positions to lockthe damper in either its open or closed position, and in its intermediate position to permit of free movement of said damper.

2. The combination with a stove pipe section having an opening formed therein, of a 60 casing connected to the section on opposite sides of the casing, a transverse rod journaled 1n the casing and extendlng across the opening of the. section,-a handle connected to one end of the rod and disposed exteriorly of the casing, a supporting arm fulcrumed on the rod and having its inner end disposed Within the section, the outer end projecting through the opening and into the casing, a damper connected to said inner end, a weight connected tothe outer end of the supporting arm for normally retaining the damper in a closed position, and U-' shaped arms respectively having their ends rigidly connected to the rod and disposed in planes at substantially right anglesto each other, said U-shaped arms being both disposed below the pipe section and on opposite sides of the outer end of the damper carrying arm and to alternately lock the damper in its'closed or open position upon rotation of the transverse rod.

In testimony whereof, I affix my signature, in presence of two witnesses.

DAVID W. POWVERS.

I Witnesses:

R. W. TATMAN, M. L. TATMAN. 

